Dandy-roll for paper-machines



(No Model.)

J. RANDALL.

I DANDY ROLL FOR PAPER MACHINES.

No. 249,992. Patented Nov. 22,1881.

N. PETERS, Phoko-Lnhogmphcr. Washirlglon. D. c.

" UNITED STATES PATENT GFFIGE,

JAMES RANDALL, OF NORWICH, CONNECTICUT.

DAN DY-ROLL FOR PAPER-MACHINES.

SPECIFICATION forming part of Letters Patent No. 249,992, dated November22, 1881,

V I Application filed October 25, 1881. (No model.)

To all whom it may concern:

Be it known that I, JAMES RANDALL, a citizen of the United States,residing at Norwich,

water-marking paper called dandy-rolls, in

which certain marks are impressed upon the moist and soft paper as it ispassed under them.

My object is to do away with separate rolls 'for each mark or designrequired, and thus greatly lessen the expense, and to so balance mypeculiar roll as that it shall bear very lightly upon the paper; and myinvention consists of a roll made up of separate sections orinterchangeable forms, with its journals resting upon the short ends oflevers with adjustable weights. The mechanism by which I attain this isshown in the accom pan yingdrawings, in which Figure 1 is a plan view ofthe parts of the roll locked together ready for use. Fig.2 is a view ofthe compound or composite roll with two of its sections removed. v

Similar letters refer to similar parts in the different views.

, A is part of the frame-work or machine upon which the improveddandy-roll is mounted.

B is one of the two slotted standards in which the journal of theroller-shaft turns.-

0 denotes the entire roll, made up of its several sections.

D and F are the end disksforming the frame upon which the roll-sectionsare mounted, and adjust laterally to admit longer or shorterrollsections.

E is-a central movable disk, provided with small pins a, that entercorresponding holes in the ends of the roller forms or sections.

G G represent two levers that support the journal f of the roll. Thelevers are fulcrumed in the posts B,furnished with a series of holes, g,for pinning the said levers.

' H H are the weights, adjustable along the levers.

KL M N are the four sections that go to make-up the roll.

.place for storage,

P is a flanged cap, that is turned forward upon the screw-ended journalafter the sections are in place to hold them firmly.

Until quite recently separate dandy-rolls for water-marking wererequired for each name or design; hence the rolls were often multipliedto the number of several hundred. These rolls were expensive, as eachone required a carefully-adjusted central journal shaft. They took up,from their form, necessarily a large My object is to haveinterchangeable and removable forms used upon a singlejournal and itsdisks, or spiders, as theyare sometimes called. These forms, beingsections of a hollow cylinder, readily pack away in a comparativelysmall space. Each one of the forms may contain all the letters ordesigns needed, and be used with others that have no letters. The formis made ofthin perforated metal, with end pieces of thicker material.The two forms H and Mmay be placed first in position, the pins a passinginto holes in their ends. position the sustaining-disk E is pushed alongits journaled shaft until its pins enter holes in the inner ends of theforms. The forms L and N are then secured to the pins on the outer sideof disk E. After these two are in position the flange-cap 1 is screwedup until it catches over the correspondinglyfianged ends of the forms,as seen at t, Fl". 2

It will be readily seen as the holding-disks After these two are in Eand D adjust on the journal-shaftthat forms 4 of difi'erent lengths maybe used, and that these forms may make cylinders of varyingdiameters,the different sizes resting readily upon the same disk-pins.

I have shown pins in the disks entering holes in the form ends; but itis, of course,

evident that the pins maybe in the forms and q the holes in the disks.

It is evident also that projections ortenons extending laterally fromthe ends of one set of forms may enter corresponding holes or recessesin the ends of a second set.

The designs or letters are small wire, soldered upon the perforatedmetal surface of the forms in the usual way. As there is nothing new inthis, the letters have not been shownin the drawings. A large number ofthese cheaply-made forms can be kept on hand, and only adjust the exactpressure wanted by means of weights adjustable on the longer ends of thelevers.

It is quite evident that exactly the same result may be accomplished byattaching weights and cords to the journals or by resting the journalson springs that may readily be adjusted for various weights, the onlyrequisite being that the roll shall be counterbalanced so as to bearlightly upon the paper. It is especially necessary in a dandy-roll thatit do not bear heavily upon the paper. With my balancing-levers, ortheir equivalents in weights or springs, a roll of fifty pounds may bemade to run over the paper as lightly as the ordinary small dandy-rollformerly used. A balancing device of some sortand it may be of any wellknown to inechanism-is a very important addition to a compound roll,which is, from the nature of things, somewhat heavy.

I am aware that springs are used to vary and add to the weight of rollsin various mechanical devices; but no dandy-roll has ever been balancedto reduce its pressure.

I am also aware that various devices have lately been invented toreplace the old dandyroll, such devices consisting of reversible lottersplaced upon forms that rock or partially rotate upon the paper; but itis found in practice that a continually-rotatingcylinder ispreferable.

I do not broadly claim a composite marking device or one made up ofsections; but

What I claim is l. A dandy-roll made up of removable and interchangeablesections, upon which distinct devices. may be made, the several sectionswhen united forming of themselves a complete and perfectcylinder-surface, all as and for the purposes set forth.

2. In a water-marking roll composed of various sections or parts ofcylinders, the combination of the central shaft or journal and themovable retaining-disks adjustable for varying lengths of forms, all asdescribed;

3. The combination, with a water-marking roll made up of removablesections, of the slotted standards B, the lever G, for sustaining theends of the journal, and: the adjustable weight H, all as described.

4. In a water-marking roll composed of re movable sections,'thecombination of th'eflange t and the flanged cap 1?, screwing upon thejournal to secure the forms, all as andfor the purposes described.

5. In combination with adandy-roll for wator-marking, made substantiallyas described, levers and weights for counterbalaneing it, all asand forthe purposes set forth.

JAMES RANDALL.

Witnesses ALLEN TENNY,

ALONZO H. HARRIS.

